A food processing apparatus includes a vessel having an internal space for containing food material therein. A body is seated on a top portion of the vessel, and has a seating part formed in a periphery with a plurality of coupling holes. A body cover is coupled with the top surface of the seating part, and can be opened and closed. A silicone packing is disposed between the body cover and the body, and has protrusions extending from a bottom surface thereof in positions corresponding to the coupling holes of the seating part. Each of the protrusions has a recess formed therein, thereby to be easily deformed when inserted into each of the coupling holes. The silicone packing disposed between the body and the body cover can stably maintain coupling while preventing steam from entering through a gap in a joint between the body and the body cover.